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Finding the Fourth Proportional to 666,371.86, 919,711.56 and 394,590.64

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Solution

The fourth proportional to 666,371.86, 919,711.56 and 394,590.64 is: 544,605.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,371.86 : 919,711.56 = 394,590.64 : x
  2. Step 2: Convert to fraction form
    666,371.86/919,711.56 = 394,590.64/x
  3. Step 3: Cross multiply
    666,371.86x = 919,711.56 × 394,590.64
  4. Step 4: Simplify right side
    666,371.86x = 362,909,573,075.80
  5. Step 5: Solve for x
    x = 362,909,573,075.80/666,371.86
  6. Step 6: Final answer
    x = 544,605.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.